Cornice-brake



I (N M d 1.) l V o -0 e H. SYMONDS.

CORNICE BRAKE.

Patented Deo. 4, 1888.

UNITED STATES PATENT OFFICE.

HERBERT SYMONDS, OF ST. LOUIS, ASSIGNOR OF ONE-HALF TO CHARLES I). MOODY, OF VEBSTER GROVES, MISSOURI.

CORNICE-BRAKE.

SPECIFICATION forming part of Letters Patent No. 394,145, dated December 4, 1888.

Application tiled August 3, 1888. Serial N0. 281,900. (No model.)

To aZZ whom, it may concern.-

St. Louis, Missouri, have made a new and useful Improvement in Cornice-Brakes and Analogous Sl1eett-Metal-Forming Machines, of

which the following is a t'ull, elear and exact description.

The improvement relates to that part of the machine whieh is used in gag'ing the To movement ot' the bending-bar. Prior tothe date thereof what is termed a quadrantal gage had been employed, consisting of a quadrantal arm provided with a stud adapted l and out ot' the field ot the movement of the to be adjusted and held at any desirable point upon the arm, and when so adjusted forming a stop projecting into the plane in which the bending-bar lever moves and limiting its progress. The operator adjusted the stop upon the arm to eorrespond to the 2o angle it was desired to form in. the metallie sheet and then turned up the bemling-bar,

earrying the sheet until the bending-bar lever encountered the stop, and when a seeond bend was required the stop was readjusted upon the arm, the sheet readjusted in the Tnaehine, and the 'bending-bar again turned up until its lever eneountered the stop, and

so on, shifting the stop with every change in or it' a number 0t` 3 the angles required; 3o sheets were to 'be formed similarly and it was desired to retain the stop in one position until all the sheets had been bent to the angle eorresl'nnnling to the position ot' the stop before proceeding to the forming of the seeond bend or angle, the sheets were sneeessively inserted in and successively removed from the machine every time a bend or angle was t'ormed. I'y either ln'oeedure eonsiderable time and labor were required, and 4o the operation was a tedious one.

To lessen the difficulty referred to and to provide for operating a eorniee-ln'ake more expeditiously than hitherto has been attainable 'is the aim oit' the present improvement,

which consists in eontriving the stop so that, while it may be adjusted and fixed at any desired point upon the quadrantal arm, a portion ot itwnamely, that portion which projeets into the tield ot the movement ot' the 5o bending-bar lever and the part with which the lever eomes in eontaet--is made readily removable from said field, thereby enabling several stops to he attached at the same time to the quadrantal arm, and respeetively at those points thereon which correspond to the various angles or bends of the eorniee to be shaped and to be used sueeessively without Changing the positions of the stops upon the quadrantal arm or without withdrawing' the sheet from the brake until the entire eorniee or until several angles, at least, of the eorniee, have been formed-that is, by being able to shift the movable portion ot' the stop into bending-bar level' the operator is enabled to 65 nflanipnlate the stops to bring said movable portion ot any one ot' them into position to gage themovementof the bending-bar lever, or out ot' position, so that the bending-bar lever can be moved past it and against some 7o other stop in the series, all substantially as is hereinafter more fully set out and claimed, aided by a reterenee to the annexed drawings,

. making part of this speeitieation, and exhibiting the most desirable mode of earrying out the improvement, and in whieh Figure lisa side elevation ot a eornieebrake having the improvement. Only that portion of the brake is shown which is needed for an understanding of the improvement, and the improved portion ot the eonstruetion is shaded to more readily distinguish it. Fig. 2 is a front elevation ol" the parts ot' Fig'. l; Fig. 3, a section on an enlarged seale on the line 3 3 oi Fig. l; Fig. l, an end elevation ot' S5 one ol the stops; and Fig. 5, a view analogous to that ot' Fig. l, but showing a modiiieation of the improvement.

The same letters ot' reference denote the same parts. 9o

The cornice-brake A (shown in Figs. l and represents any of the YFamiliar eonstruetions in use, saving as the (.onstruetion may be moditied or supplemented by the improvement in question. B, Figs. l and i?, represents the bending-bar lever.

O represents the quadrantal arm, past whieh the lever B is moved, as indicated by the positions of the lever shown in full and in Too broken lines, respectively. The arm C is slotted at c.

D D' D2 represent a series of the stops used to -gage the movement of the lever B. The essentials of the stop are a holder portion, d', by which the stop is fastened to the arm C, and another portion, d', attached to said portion d, but so that the portion d' can be turned, swung, slipped, drawn, thrust, or otherwise moved to bring it into or out of the path in which the lever B is moved-that is to say, there are several ways of attaching the stop to the arm C, several ways of constructing and of uniting the portions (l d', and several ways of moving the portion d' into and out of the way of the lever B. Vhat I consider as desirable as any is shown in the annexed drawings, and especially in Figs. 3 and 4. The portion (l consists of a bolt, d2, passed through the slot c and provided with a nut, (Z2. The bolt d2 has a head, (14,10 come against the inner face of the arm C, and by screwing the nut onto the bolt, so as to draw the inner end of the nut against the outer face of the arm C or against an interposed Washer, CZ, as shown, t-he parts d2 (Z3 can be clamped to the arm C. The bolt (l2 is perforated longitudinally at d, and the nut d3 is extended longitudinally and is chambered at (F. The portion d' of the stop is in the form of a bolt, and; it is held in the perforation d of the bolt d2 and in the chamber (Z7 of the nut d3.

In Fig. 3 the bolt d' is shown closed into the holder, and when thus closed no obstacle is presented to the lever B; but by moving the bolt d' endwise it can be moved outward from Vthe holder'into the position shown inY the broken lines, Fig. 3, and in the full lines in Fig. and in the last-named position it extends across the pathway of the lever B. To hold the bolt il' in either of its positions against being` accidentally displaced, the spring (Z2, Fig. 3, is employed. The spring at its outer end is attached to the shell of the nut, substantially as shown, and its outer portion, d, is upon the outer side of the nut, and its inner portion, d10, is folded upon its outer portion, but is contained within thechamber CF, and when the bolt (Z is closed the bend d of the spring comes against the inner side of the head (112 of the bolt, and when the boltd is opened out the curved end (Z13 of t-he spring comes against the outer side of the bolt-head This serves to stay the bolt sufficiently to keep it from being jarred out of place, but not so as to' prevent the bolt from being intentionally moved.

In operating the stops D D D2, dac., they then turned down.

are clamped to the arm C at the proper points thereon to suit the respective angles or bends to be made in the sheet E. That one of the stops to be used firstsay the stop D-has its bolt d pushed out, as shown in Fig. 2, and the bolts d' of the other stops, D' D2, are closed. AThe bending-bar is then upturned until its lever B encounters the bolt d of the stop D and the desired angle or bend is formed in the sheet. The bending-bar and lever are If the next stop to be used is the one D2, the bolt d' of that stop is pushed out and made to gage the movement of the lever B, and the'second Yangle or bend is formed in the sheet. If the next stop to be used is the one D', then the bolt d of the stop D2 is closed into its holder, and the bolt d' of the stop D is thrust outward and made to limit the upward movement of the bendingbar lever and a third angle or bend is formed in the sheet, and so on, closing into their respective holders those bolts d' which do not for the time being require to be used and opening out the bolt d' of that stop which is required to be used. By this means many angles or bends can be formed readily in a sheet without removing it from the machine and without shifting the stops upon the arm C.

A modification of the construction within the principle of the improvement is applying the stops D D', dsc., to the quadrantal arm, as before, but attaching the quadrantal arm to the journal of the bending-bar, so as to revolve with it. This is shown in Fig. 5. The bolts d of the stops in such case are contrived to encounter a suitable shoulder, and so that the angles or Vbends shall be properly made in the sheet E.

l claiml. The combination of the arm C and the stops D D', &c., said stops consisting of a holder portion, d, for securin the stop to said arm, and a movable portion, d', substantially as and for the purpose described.

2. The combination of the arm C, the bolt d2, perforated as described, the chambered nut d2, and the bolt d', substantially as described. A

3. A sheet-metal-forming machine having a slotted qu adrantal arm, C, and one or more stops, D D', dac., said stops being adjustable upon said arm and each having a movable portion, d', substantially as and for the purpose described.

` HERBERT SYMONDS.

Vitnesses:

C. D. MOODY, B. T. MESKER.

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